Integer overflow in Siemens products - CVE-2021-31889

Vulnerability identifier: #VU58089

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-31889

CWE-ID: CWE-190

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to integer overflow. A remote attacker can send a specially crafted TCP packet, trigger integer overflow and cause a denial of service condition on the target system.

Nucleus NET
Nucleus Source Code
Capital VSTAR
Nucleus ReadyStart
APOGEE MBC (PPC) (P2 Ethernet)
TALON TC Modular (BACnet)
TALON TC Compact (BACnet)
APOGEE PXC Modular (P2 Ethernet)
APOGEE PXC Compact (P2 Ethernet)
APOGEE MBC (PPC) (BACnet)
APOGEE MEC (PPC) (BACnet)
APOGEE PXC Compact (BACnet)
APOGEE PXC Modular (BACnet)
APOGEE MEC (PPC) (P2 Ethernet)
SIMOTICS CONNECT 400
PLUSCONTROL 1st Gen
Google Android

Install updates from vendor's website.

Nucleus ReadyStart - addressed in versions 4.1.1, 2017.02.4
Google Android - addressed in versions 9 2022-01-05, 10 2022-01-05, 11 2022-01-05, 12 2022-01-05
SIMOTICS CONNECT 400 - update to 0.5.0.0

• https://cert-portal.siemens.com/productcert/pdf/ssa-044112.pdf

• Multiple vulnerabilities in Siemens Nucleus RTOS TCP/IP Stack
• Multiple vulnerabilities in Siemens APOGEE and TALON Products
• Multiple vulnerabilities in Siemens Capital VSTAR
• Multiple vulnerabilities in Google Android
• Multiple vulnerabilities in Siemens PLUSCONTROL 1st Gen
• Integer overflow in Siemens SIMOTICS CONNECT 400